11361 results about "Hydroxy group" patented technology

The invention discloses a pure bio-based polyhydroxyalkanoate adhesive as well as preparation and application thereof, and belongs to the technical field of degradable adhesives. According to the adhesive, polyhydroxybutyrate valerate or polyhydroxybutyrate hexanoate is used as a matrix, and the acid value reaches 2-15 mg KOH / g through molten end group activation; a reactive emulsifier with a hydrophilic-lipophilic balance value of 9-12 is introduced into a water phase, and the stable aqueous dispersion is prepared through phase inversion high-shear emulsification. The Z-average particle size of the dispersion is 0.12-0.30 [mu] m, and the content of the free surfactant is not higher than 30wt%. After the tackifying resin, the plasticizer and the vegetable wax are compounded, the bio-based carbon content of the obtained adhesive is not lower than 95%, and the volatile organic compound content is not higher than 100 mg / kg. The paper / paper heat sealing strength of the adhesive is not lower than 7.0 N / 15mm, the 180-degree peel strength is not lower than 7.5 N / 25mm, and the adhesive can pass repulping evaluation.

An aqueous ultraviolet-absorbing resin emulsion, and an aqueous resin emulsion composition containing the emulsion is provided, wherein the emulsion is excellent in compatibility with a synthetic resin and light resistance. Also, the emulsion improves stability in blending with an aqueous emulsion of the synthetic resin, and prevents bleed out of the ultraviolet-absorbing resin on the surface of a coating film. Further, the aqueous ultraviolet-absorbing resin emulsion imparts excellent alkali or solvent resistance to a synthetic resin poor in alkali or solvent resistance. More specifically, an aqueous resin emulsion composition comprising (I) an aqueous ultraviolet-absorbing resin emulsion and (II) an other aqueous resin emulsion is provided, wherein the emulsion (I) is obtained by urethanizing (A) a polyol component having an ultraviolet-absorbing group {e.g., 1,1-bis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzeneethanol]methane}, (B) a polyol if necessary, (C) an alkyl or aryl dialkanolamine compound, and (D) an organic polyisocyanate in (E) an organic solvent, diluting the reaction mixture with (F) an organic solvent having a boiling point lower than 100° C. to give a resin solution, neutralizing the resin solution with (G) a neutralizing agent, and dispersing the resultant in water.

The invention provides a recombinant strain for controllably synthesizing high-proportion 4-hydroxybutyric acid (4HB) polyhydroxyalkanoate (PHA) as well as a construction method and application of the recombinant strain. The recombinant strain disclosed by the invention can be used for efficiently producing high-proportion poly (3-hydroxybutyrate-4-hydroxybutyric acid) (P34HB for short) by using glucose as a unique carbon source or a 4HB structure related or non-related carbon source in amplification production of a shake flask, a 7L fermentation tank, a 100L fermentation tank and a 5000L fermentation tank.

The invention discloses a hydroxytyrosol-ergothioneine eutectic crystal as well as a preparation method and application thereof, and belongs to the technical fields of medicines, foods, daily chemicals and the like. The invention provides a hydroxytyrosol-ergothioneine eutectic crystal. The X-ray powder diffraction pattern of the hydroxytyrosol-ergothioneine eutectic crystal has characteristic diffraction peaks at least corresponding to the positions where the 2 theta value is 4.21 degrees + / -0.2 degrees, 8.36 degrees + / -0.2 degrees, 12.29 degrees + / -0.2 degrees, 15.29 degrees + / -0.2 degrees, 19.40 degrees + / -0.2 degrees, 20.98 degrees + / -0.2 degrees, 23.12 degrees + / -0.2 degrees and 28.73 degrees + / -0.2 degrees. According to the hydroxytyrosol-ergothioneine eutectic, the melting point of hydroxytyrosol is increased, the hygroscopicity of hydroxytyrosol is remarkably reduced, and meanwhile the stability of hydroxytyrosol and ergothioneine is enhanced. In addition, after the ergothioneine hydroxytyrosol forms the eutectic crystal, the ergothioneine hydroxytyrosol can also play better anti-oxidation and anti-aging effects.

Disclosed in the present invention are a fluorosilicone-modified low-surface-energy antifouling coating and a preparation method therefor. The coating comprises the following components in parts by weight: 11-15 parts of butyl acrylate, 3-4 parts of dodecafluoroheptyl methacrylate, 3-4 parts of vinyl-terminated polydimethylsiloxane, 3-4 parts of 2-hydroxy-4-acryloyloxybenzophenone, 30-38 parts of methyl isobutyl ketone, 0.15-0.25 parts of azobisisobutyronitrile, 0.1-0.2 parts of sodium hydroxide, 2-3 parts of modified titanium dioxide nanoparticles, and 0.5-1.5 parts of 3-aminopropyltriethoxysilane. In the present invention, vinylpentamethyldisiloxane reacts with decamethylcyclopentasiloxane to prepare vinyl-terminated polydimethylsiloxane; a titanium dioxide precursor is mixed with polydopamine nanoparticles for modification to prepare modified titanium dioxide nanoparticles; and then the components above are mixed to prepare the fluorosilicone-modified low-surface-energy antifouling coating. The coating has low surface energy and good adhesion and ultraviolet resistance.

The invention discloses a heavy metal chelating agent for industrial wastewater and a preparation method of the heavy metal chelating agent, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that 2-hydroxyphenylboronic acid is subjected to graft modification through acrylic acid and polymerized on the surface of activated biomass porous carbon powder with acrylic acid, boron-containing polymer modified porous carbon is obtained, and then ferric chloride hexahydrate serves as an iron source; a boron-containing polymer modified porous carbon surface and aminated magnetic adsorption nanospheres are obtained, B-N coordination is formed between the aminated magnetic adsorption nanospheres and the boron-containing polymer modified porous carbon surface, boron element fixation is achieved through modified copolymerization, loss caused by long-time use of the boron element is avoided, lasting and stable chelation is guaranteed, activated biomass porous carbon serves as a carrier, and macromolecular resin serves as a coating layer. The environment-friendly biochar has the advantages of favorable degradability, greenness, degradability, safety and high efficiency, and avoids the problem of secondary pollution caused by the use of a chelating agent.

The invention discloses a silane coupling agent grafted MXene composite material and a preparation method thereof, relates to the technical field of composite materials, and aims to provide a surface modification method to enable the MXene composite material to be in good contact with a PDMS (polydimethylsiloxane) material. The surface modification method comprises the following steps: S1, performing wet chemical etching on an MAX phase material in combination with mechanical stripping to obtain a few-layer MXene dispersion liquid; s2, strong base is added into the few-layer MXene dispersion liquid in the step S1, the PH value of the few-layer MXene dispersion liquid is adjusted, a reaction is conducted in the argon environment, and hydroxyl modified MXene dispersion liquid, namely h-MXene dispersion liquid is obtained; and S3, adding a silane coupling agent and a catalyst into the h-MXene dispersion liquid in the step S2, and reacting in an argon environment to obtain the silane coupling agent grafted MXene composite material.

A surface treatment agent containing a hydrocarbon-terminal-group-containing compound of the following formula makes it possible to form a cured film that is exceptional in water repellency, slipperiness, dirt removability, and abrasion resistance, particularly steel wool abrasion resistance and wet abrasion resistance. (R1 is a C12-80 monovalent hydrocarbon group that includes a C12 or higher monovalent or divalent linear unsubstituted aliphatic saturated hydrocarbon group and does not contain a hydrocarbon branched structure, R2 is H, a halogen atom, a hydroxyl group, a siloxy group, an -OSi(CH3)3 group, an -OSi(C2H5)3 group, an amino group, an SH group, a monovalent hydrocarbon group, R1, -V-Z-(Y-A)m, or -Y-A, U is a single bond, C, or a trivalent or tetravalent organic group, V is a single bond or a divalent hydrocarbon group, Z is a single bond, C, Si, N, S, or a trivalent to octavalent organic group, Y is a single bond or a divalent hydrocarbon group, A is a monovalent reactive group, k is 0, 1, or 2, and m is 1-7.)

The invention relates to the field of anticorrosive paint, in particular to anticorrosive paint containing lanthanum cerium oxide and a preparation method of the anticorrosive paint. The invention relates to an anticorrosive coating containing lanthanum cerium oxide. The anticorrosive coating is prepared from the following raw materials: 28 to 45 parts of ultraviolet stable composite film forming matter, 5 to 10 parts of composite rare earth filler, 6 to 12 parts of supported synergistic antirust agent, 18 to 30 parts of mixed solvent, 0.8 to 2.5 parts of dispersing agent, 2.7 to 5.3 parts of functional additive and 0.5 to 1.2 parts of nano montmorillonite, the composite rare earth filler is lanthanum cerium oxide-hydroxyapatite composite powder with a core-shell structure, wherein lanthanum cerium oxide is used as a core, hydroxyapatite is used as a shell, and the thickness of the shell layer is 10-20 nm; the ultraviolet stable composite film forming substance comprises epoxy resin and ultraviolet grafting modified polyurethane in a weight ratio of 1: (0.6-2.2); the supported synergistic antirust agent is a mixture of mesoporous silica supported benzotriazole and zinc molybdate. And the obtained coating is high in adhesive force and long in service life.

This invention belongs to the field of marine antifouling, and specifically relates to a transparent, self-lubricating organosilicon hybrid antifouling coating with a negatively charged surface and its preparation method. The antifouling coating is obtained by a sol-gel reaction of modified nanocellulose, hydroxy acid, and functional fluorine / siloxane monomers; the mass ratio of the hydroxy acid to the modified nanocellulose is 10–100:1; the mass ratio of the functional fluorine / siloxane monomer to the modified nanocellulose is 10–300:1. This invention, based on a multi-element green antifouling strategy, constructs a material surface with negative charge, self-lubrication, and low surface energy. The prepared antifouling coating exhibits excellent transparency, mechanical properties, and static antifouling performance. This antifouling coating is environmentally friendly and has broad application prospects in the field of marine antifouling.

The invention relates to the technical field of automatic control, in particular to a monitoring method and system for synthesizing ceramide based on alpha-hydroxy fatty acid, and the monitoring system for synthesizing ceramide based on alpha-hydroxy fatty acid comprises a raw material feeding module, a reaction control module, a quenching-crystallization joint control module and a data integration module; carrying out dynamic weighing monitoring on the raw materials based on the received synthesis instruction, and starting a reaction kettle according to weighing data; performing multi-dimensional data acquisition in real time according to the set reaction data, and performing dynamic feeding control according to the set reaction data; when the TLC detection substrate reaction is completed, the cooling process and the crystallization process are regulated and controlled in real time according to the reaction data until the end point judgment standard is met; according to a received synthesis completion instruction, product quality data is obtained, a monitoring data packet is generated, the synthesis instruction is marked and then stored, process control is accurately monitored and controlled, and the purity and crystal form of the product are ensured.

The invention discloses a supported nickel catalyst for preparing 1, 3-propylene glycol through hydrogenation of 3-hydroxypropionaldehyde as well as a preparation method and application of the supported nickel catalyst, and relates to the technical field of catalysts. The modified long-chain multi-carbon inducer is used, and a special long-chain molecular structure and a branched chain group of the inducer can effectively and selectively adsorb and occupy a micropore impregnation site; the preparation method has the beneficial effects that more active component nickel species are obviously promoted to be dispersed in main reaction confinement spaces such as mesopores and macropores and interact with the carrier to form effective active sites, and active component steeping liquor is inhibited from entering micropore channels due to capillary action; the active site failure caused by agglomeration of nickel species in micropores in the subsequent drying and roasting process of the catalyst precursor is avoided, the efficient and directional reaction is ensured, the generation of by-products is greatly reduced, the pressure is relieved for the subsequent product rectification separation, and the final product purity is improved. The catalyst provided by the invention can still keep an excellent catalytic effect when the air speed of a 3-hydroxypropionaldehyde solution is increased to 6.5 h <-1 >.

The application belongs to the technical field of pesticides, and particularly relates to a pyridylalanine derivative, a composition thereof and a use thereof. The compound is shown in the general formula I: wherein X1 represents hydrogen or fluorine, X2 represents hydrogen or fluorine, X3 represents hydrogen or fluorine, X4 represents hydrogen or fluorine, and X1, X2, X3 and X4 are not hydrogen at the same time; R1 and R2 independently represent hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl or -(CO)R3; Y1 represents hydroxyl, alkoxyalkyloxy, trialkylsilyloxy or -O(CO)R3; Y2 represents hydrogen or alkyl; or Y1 and Y2 together form =O. The compound has excellent control effects on pests such as Myzus persicae, Lygus lineolaris, Rhopalosiphum maidis and Bemisia tabaci.

The invention discloses a flexible fireproof cable and a preparation method thereof, and belongs to the technical field of cables. The cable comprises a conductor, a mica insulation layer, a copper protection layer, a buffer layer and a cable sheath layer. The buffer layer is made of a polyurethane foaming material; the cable sheath layer is prepared from the following components in parts by weight: 80 to 100 parts of methyl vinyl silicone rubber, 18 to 20 parts of modified carbon black, 5 to 8 parts of titanium dioxide, 1 to 2 parts of platinum catalyst, 3 to 6 parts of hydroxyl silicone oil, 0.5 to 1 part of zinc stearate and 0.8 to 1 part of dicumyl peroxide. The modified carbon black is added into the raw materials of the sheath layer, so that the compatibility, the interface bonding force and the flame retardant property of the carbon black and a silicone rubber matrix are effectively improved, and the mechanical property, the wear resistance and the fireproof property of the cable sheath layer are remarkably enhanced.

The invention discloses an adhesive containing epoxy-terminated polyurethane epoxy resin as well as a preparation method and application of the adhesive. The adhesive comprises the following components in parts by weight: 10-15 parts of epoxy resin, 70-75 parts of epoxy-terminated polyurethane epoxy resin, 19-21 parts of an amine curing agent and 8-15 parts of heat-conducting filler, wherein the epoxy-terminated polyurethane epoxy resin is obtained by reacting a polyurethane prepolymer and epoxy resin, NCO of the polyurethane prepolymer and hydroxyl of the epoxy resin are subjected to an addition reaction, and after the reaction is finished, NCO of a system is eliminated by adopting a small-molecule epoxy compound; the polyurethane prepolymer is obtained by reaction of isocyanate and polyether polyol with flexible chain segments. According to the adhesive, the curing heat release peak value is reduced, the toughness is improved, meanwhile, the high strength is kept, the foaming problem is avoided, the defects that a traditional epoxy adhesive is high in heat release and poor in toughness are overcome, and the adhesive is suitable for the fields such as aerospace and electronic and electric appliances which have strict performance requirements.

The invention provides a high-hydrophobicity anti-pollution flashover coating and a preparation method thereof, and relates to the field of coatings. The silicone rubber composition is prepared from the following raw materials in parts by weight: 80 to 100 parts of hydroxyl-terminated polydimethylsiloxane; 5 to 15 parts of modified nano silicon dioxide; 10 to 30 parts of a composite self-repairing microcapsule; 10 to 25 parts of a flame retardant; 3-8 parts of a cross-linking agent; 0.5-2 parts of a catalyst; 1-5 parts of an accelerant; 40 to 100 parts of a solvent; the modified nano silicon dioxide is fumed silica subjected to surface treatment by a fluorine-containing silane coupling agent and a platinum catalyst; the capsule wall of the composite self-repairing microcapsule is a polylactic acid-glycolic acid copolymer, and the capsule core of the composite self-repairing microcapsule is a mixed solution of a hydroxyl-terminated polydimethylsiloxane oligomer and methyltris (methylethylketoximino) silane. The coating has excellent hydrophobicity, weather resistance and targeted repair function.

The invention relates to the technical field of ink, and discloses a preparation method of bio-based degradable water-based ink, which comprises the following steps: carrying out esterification polymerization on vanillin-based spiro acetal diglycidyl ether and diacid to obtain bio-based polyester resin, mixing and dispersing the bio-based polyester resin, petroleum-based resin, pigment, auxiliary agent and the like to obtain the bio-based degradable water-based ink. The bio-based degradable water-based ink is prepared. The bio-based resin contains a plurality of hydrophilic hydroxyl groups, has good solubility and dispersibility in the water-based ink, and generates denser hydrogen bonds and other cross-linking effects with the acrylic resin, so that the hardness of the ink is improved. Meanwhile, the polar hydroxyl groups also greatly enhance the hydrogen bond bonding and anchoring effect between the paint film and the base material, so that the adhesive force is improved. In addition, easily-hydrolyzed spiral acetal bonds, polyester structural units and other degradable chemical bonds in molecular chains of the bio-based resin provide more attack sites for water and microorganisms, the degradation rate is increased, and the degradable function is achieved.

The invention belongs to the technical field of polyether polyol, and particularly relates to flame-retardant polyether polyol with a low heat conductivity coefficient as well as a preparation method and application of the flame-retardant polyether polyol. The flame-retardant polyether polyol with the low heat conductivity coefficient is obtained by polymerizing bis (2-hydroxyethyl) aminomethyl diethyl phosphonate, halogen-containing aniline and small molecular alcohol / alcohol amine as a ternary mixed initiator with alkylene oxide under the action of a catalyst, the ternary mixed initiator comprises the following components in percentage by mass: 12.15 to 22.78 percent of bis (2-hydroxyethyl) amino methyl diethyl phosphonate, 43.21 to 63.89 percent of halogen-containing aniline, and 23.96 to 34.01 percent of small molecular alcohol / alcohol amine. The polyether polyol realizes comprehensive properties of lasting flame retardance, high strength and low heat conductivity. The invention also provides a preparation method of the polyether polyol and application of the polyether polyol in rigid polyurethane foam.

The invention provides a hydroxytyrosol supramolecular compound and a preparation method and application thereof, and belongs to the technical field of cosmetics and biological medicine, the supramolecular compound comprises the following chemical components by mass: 0.01-10% of hydroxytyrosol, 2-45% of an amino acid compound, 2-20% of alpha hydroxy acid, 2-30% of urea, and 15-92% of water. The supramolecular compound can promote transdermal delivery of hydroxytyrosol and maintain the biological activity of hydroxytyrosol, shows high biocompatibility, and can be applied to product development in the antibacterial field, the regeneration field and the anti-aging field.

The invention discloses a clostridium corpse strain and application thereof. The preservation number of the clostridium cadaveris J038 strain of the clostridium cadaveris J038 strain is CGMCC (China General Microbiological Culture Collection Center) NO. 35440, and the clostridium cadaveris J038 strain of the clostridium The clostridium corpse J038 strain is separated from pig manure for the first time, and 4-hydroxyphenylpropionic acid is produced by metabolism of the clostridium corpse J038 strain. In addition, the invention further provides application of the clostridium corpse in preparation of 4-hydroxyphenylpropionic acid, and when the clostridium corpse is adopted to prepare 4-hydroxyphenylpropionic acid, the clostridium corpse has the advantages of being small in environmental pollution, high in sustainability, precise, green, efficient and the like; the yield is high, and the increasing requirements of the fields of medicine, food, agriculture and the like on the 4-hydroxyphenylpropionic acid can be met.

The invention relates to the technical field of PC transparent flame-retardant toughening modification, in particular to phenolic hydroxyl-terminated modified polysiloxane with a side chain containing phenyl and sulfonate groups and a preparation method of copolymerized PC. The modified polysiloxane is prepared by the following steps: performing ring opening polymerization on phenol-containing double end sockets and cyclotetrasiloxane to obtain modified polysiloxane containing double bonds and phenyl functional groups, and grafting sulfonate through a thiol-ene click chemical reaction. Diphenyl carbonate, bisphenol A and the modified polysiloxane are used as raw materials, a polysiloxane-PC block copolymer is formed through copolymerization, efficient flame retardance and high transparency are achieved, and meanwhile extremely high low-temperature impact strength is achieved.

The invention discloses a dynamic borate bond-based self-healing polyacrylic acid binder and a preparation method thereof. The dynamic borate bond-based self-healing polyacrylic acid binder comprises a polymer main chain and a dynamic cross-linking agent, the dynamic cross-linking agent is a polyol compound containing at least two pairs of ortho-hydroxyl groups; the polymer main chain is formed by copolymerizing the following monomers: an acrylic structural monomer, the molar fraction of which accounts for 85-94% of the total monomer; a functional monomer containing a boric acid group, wherein the molar fraction of the functional monomer accounts for 3-8% of the total monomer; the mole fraction of the flexible monomer containing the acrylate group accounts for 3-8% of the total monomer. Various stresses generated by different negative electrode materials in circulation can be effectively adapted and buffered through a network formed by dynamic boric acid ester bonds and reversible fracture and combination of the boric acid ester bonds, so that the service life of the battery is generally prolonged, the working temperature range of the battery can be remarkably widened, the low-temperature discharge capacity can be remarkably increased, and the high-temperature cycle life can be prolonged.

The invention discloses a tooth repair composition containing mesoporous hydroxyapatite, a tooth repair product and a preparation method and application of the tooth repair composition and the tooth repair product. The tooth repair composition comprises nano-hydroxyapatite, fluoride and a chelating agent, the logarithm value logK of the stability constant K of the chelating agent to calcium ions is 1 < = logK < = 5, and K is measured in an aqueous solution with the temperature of 25 DEG C, the pH value of 7.0 and the ionic strength of 0.1 M; the nano-hydroxyapatite is prepared from nano-scale mesoporous hydroxyapatite, and the nano-hydroxyapatite contains nano-scale mesoporous hydroxyapatite. By adding the specific chelating agent, dynamic balance is formed in the tooth repairing composition, slow release protection can be formed on free calcium ions, the double inactivation effect possibly occurring when hydroxyapatite and fluoride exist at the same time is effectively avoided, the synergistic repairing effect of hydroxyapatite and fluoride is fully exerted, and the tooth repairing effect is improved. The use of fluorides can be greatly reduced, and safety and reliability are achieved.

The invention relates to a compound, a preparation method, a hole transport layer material, a photovoltaic device and a photovoltaic module. R1 and R4 are respectively and independently selected from amino and derivatives thereof, hydroxyl and derivatives thereof, methoxyl and derivatives thereof, sulfydryl and derivatives thereof, methylthio and derivatives thereof, thiophene groups and derivatives thereof, phosphate groups and derivatives thereof, carboxylic acid groups and derivatives thereof, and sulfonic acid groups and derivatives thereof; r2 and R3 are independently selected from alkyl, a phosphate group and derivatives thereof, a carboxylic acid group and derivatives thereof, a sulfonic acid group and derivatives thereof, and trimethoxysilyl propyl and derivatives thereof. The material is beneficial to improving the photoelectric conversion efficiency of photovoltaic devices and photovoltaic modules.

The invention discloses silencing and mildew-proof organic silica gel as well as a preparation method and application thereof, and belongs to the technical field of organic silicon binding material polymers. Comprising the following components in parts by weight: 35-45 parts of nano calcium carbonate, 32-40 parts of hydroxyl-terminated polysiloxane, 5-9 parts of silencing powder, 0.5-2.5 parts of glass fiber powder, 5-9 parts of a hyperbranched polymer, 2-5 parts of a hydrophobic surface modifier, 1.5-3 parts of color paste, 1-2 parts of a water-based coupling agent, 1-2 parts of a cross-linking agent, 0.5-2.5 parts of a mildew preventive, 0.4-2 parts of a composite titanide and 0.4-0.7 part of nano silver powder. According to the invention, the nano silver powder and the mildew preventive are compounded, and an inorganic sterilization system is combined, so that broad-spectrum environment-friendly bacteriostasis is realized, and high-humidity long-acting protection is met; the powder is subjected to hydrophobic treatment, moisture is blocked, and high adhesion is kept; silencing powder serves as a core, a sound absorption network is cooperatively formed, the noise reduction capacity is improved, and the device is suitable for multiple scenes.

The invention discloses a polytetrafluoroethylene compensator with good corrosion resistance and a preparation method thereof.The polytetrafluoroethylene compensator is composed of a corrugated pipe, a pipe connecting flange and an end flange, the pipe connecting flange and the end flange are located at the two ends of the corrugated pipe, the corrugated pipe is composed of a lining layer and a base material layer, and the base material layer is made of stainless steel; the preparation method comprises the following steps: firstly, carrying out surface grafting on nano aluminum oxide by using isocyanate silane, and introducing an active reaction group; then part of active groups react with benzotriazole, so that the corrosion inhibition and adhesion enhancement functions are realized; finally, enabling the residual active groups to react with hydroxylated polytetrafluoroethylene activated by alkali treatment, and coating a chemical inert layer on the surface of the residual active groups; the obtained core-shell structure functional filler is dispersed in epoxy resin to prepare a coating, and after the coating is coated on a stainless steel base material and cured, a high-performance compensator with high hardness, strong adhesive force, excellent corrosion resistance and weather resistance is formed.

The invention relates to the technical field of optical cement, in particular to high-temperature-resistant acrylic optical cement with high light transmittance and a preparation method of the high-temperature-resistant acrylic optical cement. The preparation method of the high-light-transmittance high-temperature-resistant acrylic optical adhesive comprises the following steps: (1) under the protection of inert gas, mixing an acrylate monomer, a carboxyl-containing monomer, an epoxy-containing monomer, a hydroxyl-containing monomer, a photoinitiator and modified inorganic nanoparticles, and stirring at 60-90 DEG C and 200-600rpm for 3-8 hours to obtain an adhesive solution; and (2) carrying out vacuum curing on the glue solution at 50-80 DEG C for 5-15 minutes to form a glue material, pressing the glue material into a film, and cooling to obtain the optical cement. The prepared high-temperature-resistant acrylic optical adhesive with high light transmittance has good light transmittance, high-temperature resistance and good peel strength, the light transmittance of the optical adhesive is larger than 90%, the heat-resistant temperature is larger than 150 DEG C, the peel strength is larger than 14 N / 25 mm, and the peel strength after high-temperature treatment is larger than 11.8 N / 25 mm.

S-Beta-hydroxybutyric acid compositions for oral delivery are effective in rapidly raising blood ketone levels without causing acute acidosis or gastrointestinal (GI) distress when consumed in sufficiently dilute form and / or as a gel or suspension. By limiting added beta-hydroxybutyrate salts containing alkali or alkaline earth metal ions, beta-hydroxybutyric acid solutions, gels, or suspensions can deliver exogenous ketone bodies without significantly altering electrolyte balance. Although aqueous beta-hydroxybutyric acid solutions are moderately acidic with a pH of about 3.5 to 4, when diluted with sufficient water, the water acts as a pseudo buffering agent that offsets otherwise harsh acidic effects when consumed orally. Gels and suspensions can also ameliorate acidic effects by partially encapsulating the beta-hydroxybutyric acid. Beta-hydroxybutyric acid can be pure S-beta-hydroxybutyric acid or a non-racemic mixture enriched with S-beta-hydroxybutyric acid relative to R-beta-hydroxybutyric acid.

The invention provides a bio-based 1, 4-butanediol composition as well as a preparation method and application thereof, and the bio-based 1, 4-butanediol composition comprises bio-based 1, 4-butanediol, 4-hydroxybutyric acid-(4-hydroxyl) butyl ester and bis (4-hydroxyl) dibutyl ether. The total mass content of 4-hydroxybutyric acid-(4-hydroxyl) butyl ester and bis (4-hydroxyl) dibutyl ether in the bio-based 1, 4-butanediol composition is 51 to 220 ppm. The bio-based 1, 4-butanediol composition has low hygroscopicity, and can maintain low water content after long-term storage; meanwhile, when the bio-based 1, 4-butanediol composition is used for polyester synthesis, the esterification time can be shortened, the reaction efficiency can be improved, side reactions can be reduced, and a polyester product with better damp-heat resistance stability can be obtained.

The application relates to the technical field of carbon dioxide capture, in particular to a solid amine CO2 adsorbent and a preparation method thereof. The solid amine CO2 adsorbent comprises a carrier and an organic amine; the organic amine comprises small-molecule amine and macromolecular amine with a mass ratio of 1:3 to 3:1, the small-molecule amine has a relative molecular mass of less than 500 Da and contains a hydroxyl group, the macromolecular amine has a relative molecular mass of more than 1000 Da, the small-molecule amine and the macromolecular amine are both loaded on the carrier, and at least part of the small-molecule amine is connected between the carrier and the macromolecular amine. The solid amine CO2 adsorbent improves the adsorption performance and the cyclic stability of the solid amine CO2 adsorbent.